$(document).ready(function(){
        $("a[rel^='prettyOverlay'],a[rel^='prettyPhoto']").prettyPhoto({
            animationSpeed: 'fast', /* fast/slow/normal */
            padding: 40, /* padding for each side of the picture */
            opacity: 0.4, /* Value betwee 0 and 1 */
            showTitle: true, /* true/false */
            allowresize: true /* true/false */
        });
    });